G&O Maritime Group

We are a group of sub system providers to the maritime industry, all developing high quality products and enabling our customers through the green transition in the maritime industry

Our brands are part of three divisions

Propulsion management

Offers vibration compensators, cylinder lubrication systems and piston rod stuffing boxes. We cooperate with engine manufacturers and shipping companies to optimise main engine operations and support the important task of utilising new environmentally friendly fuel types.


Water & Waste management

Includes incineration plants and biological water purifying plants, securing that waste water is purified before discharge while solid waste and oil sludge is incinerated at high temperatures to reduce SOx and NOx emissions.


Tank management

Provides PV valves and protects tank vessels against unintended overpressure or vacuum while simultaneously protecting against fire risk and ensuring that emissions from the cargo is kept to a minimum in accordance with IMO standards.

One group, six leading brands

Division: Water & Waste management

Incineration of waste and oil sludge, eliminating the need for discharging to shore while reducing emissions from incineration.

Division: Water & Waste management

Biologically cleaning of grey and black waste water before it is discharged.

Division: Propulsion management

Compensators that eliminate vibrations at the source, reducing cost, improving comfort, and cutting fuel spend.

Division: Propulsion management

Leading global provider of cylinder lubrication systems for two-stroke marine engines.

Division: Propulsion management

Piston rod stuffing boxes for two-stroke engines continuously improved to live up to new fuel types entering the market.

Division: Tank management

Valves and venting equipment reducing emissions from cargo while keeping vessels, equipment and crews safe every day.

Our vision is to make vessels a greener and safer place to work

We are here for our customers through times of change

The maritime industry is undergoing a green transition in which new technologies and fuel types are of paramount importance.

In G&O Maritime Group, we want to offer value to our customers through our deep technical expertise, through R&D and by understanding our customers’ needs. Our ambition is to stand out as one of the strongest suppliers in the industry, enabling our customers during this important market change.

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Latest news in G&O Maritime Group

  • The importance of biological water treatment

    The importance of biological water treatment

    The process of biological water treatment The process of biological water treatment involves several stages.  Why use biological waste water treatment? Biological treatment of waste water is an effective and efficient way to remove contaminants from water. It is also a relatively low-cost and environmentally friendly process, as it relies on natural biological processes rather […]

  • Pres-Vac Visits Silicone Valley

    Pres-Vac Visits Silicone Valley

    Last week, our Pres-Vac representative Sofia Grave flew out to Silicone Valley, U. S. A., with those same students and representatives. Under the headline ‘Green Maritime Entrepreneurs’, the DTU and Danish maritime industry delegates explored the cross-field of innovation, digitalization, data-driven technology, and entrepreneurship in Silicon Valley.

  • SERVICE LETTER: Succeed with SIP

    SERVICE LETTER: Succeed with SIP

    The purpose of this Service Letter is to guide the user in optimizing the cylinder oil feed rate, so the full saving potential and better cylinder condition made possible by the Hans Jensen’s Swirl Injection Principle (HJ SIP) valves

  • Pres-Vac Engineering celebrating 70th anniversary

    Pres-Vac Engineering celebrating 70th anniversary

    Pres-Vac Engineering celebrating 70th anniversary